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Differential D64183 Diff 219578 llvm/lib/CodeGen/UnreachableBlockElim.cpp

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llvm/lib/CodeGen/UnreachableBlockElim.cpp

Show First 20 Lines • Show All 97 Lines • ▼ Show 20 Linesvoid UnreachableMachineBlockElim::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addPreserved<MachineDominatorTree>(); AU.addPreserved<MachineDominatorTree>();
MachineFunctionPass::getAnalysisUsage(AU); MachineFunctionPass::getAnalysisUsage(AU);
} }
bool UnreachableMachineBlockElim::runOnMachineFunction(MachineFunction &F) { bool UnreachableMachineBlockElim::runOnMachineFunction(MachineFunction &F) {
df_iterator_default_set<MachineBasicBlock*> Reachable; df_iterator_default_set<MachineBasicBlock*> Reachable;
bool ModifiedPHI = false; bool ModifiedPHI = false;
MMI = getAnalysisIfAvailable<MachineModuleInfo>(); auto *MMIWP = getAnalysisIfAvailable<MachineModuleInfoWrapperPass>();
MMI = MMIWP ? &MMIWP->getMMI() : nullptr;
MachineDominatorTree *MDT = getAnalysisIfAvailable<MachineDominatorTree>(); MachineDominatorTree *MDT = getAnalysisIfAvailable<MachineDominatorTree>();
MachineLoopInfo *MLI = getAnalysisIfAvailable<MachineLoopInfo>(); MachineLoopInfo *MLI = getAnalysisIfAvailable<MachineLoopInfo>();
// Mark all reachable blocks. // Mark all reachable blocks.
for (MachineBasicBlock *BB : depth_first_ext(&F, Reachable)) for (MachineBasicBlock *BB : depth_first_ext(&F, Reachable))
(void)BB/* Mark all reachable blocks */; (void)BB/* Mark all reachable blocks */;
// Loop over all dead blocks, remembering them and deleting all instructions // Loop over all dead blocks, remembering them and deleting all instructions
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